The biggest problem with it would be the horde is stil.. divided. Young warriors see garrosh ofcourse as there real leader and inspiration since they only know the blood curse and the struggle of the orcs as history. The Veteran warriors and shamans see thrall stil as the real leader of the horde as they both want to be done with the bloodshed and just want to stay in a place they can call home.
The other problem is killing a warchief never goes good in the books, for doomhammer it did but that was because blackhand was a puppet. but for thrall it would go in the history as 1 of the biggest faults ever + he made garrosh warchief so the only way is through Mak'gora.

I doubt Garrosh would be a faceroll anyway, would probably give Thrall a run for his money and inflict some serious wounds, if not death.

OR thrall could just lava burst him in the face? His lava burst smashed that ice wall in hour of twilight. I am sure it would fuck up Garrosh. Even his lighting bolt killed 4 dragons at once in one book.

Thrall is so lame for like 3 expansions now. Got owned in wotlk while dueling garrosh, he let garrosh take over the horde and let cairne get killed by garrosh.
After all the chaos from cataclysm and all the drama, we are shown thrall's shitty wedding. Fantastic storytelling blizz.

OR thrall could just lava burst him in the face? His lava burst smashed that ice wall in hour of twilight. I am sure it would fuck up Garrosh. Even his lighting bolt killed 4 dragons at once in one book.

OR thrall could just lava burst him in the face? His lava burst smashed that ice wall in hour of twilight. I am sure it would fuck up Garrosh. Even his lighting bolt killed 4 dragons at once in one book.

So why didn't he do all those things to Arcurion, Asira Dawnslayer (or whatever her name is) and Benedictus instead of requiring help from 5 random people? :P Power levels are so skewed.